Shaft-turning tool



v ,499,939 UHY if 19% w. z. LINDERs SHAFT TURNING TOOL Filed Dem-4, 19202 Sheem--SheeD 1 Attorney W. Z. LINDERS SHAFT TURNING TOOL l Filed Dec.2 Sheets-Sheet 2 tzorzey.

Patented July l, i924.

WILLIAM Z. LINDERS, OF ST. LOUIS, MISSOURI, ASSIGNOR TO NOR-THUESTERNMACHINE CORPORATION, OF ST. LOUIS, MISSOURI, A CORPORATION OF\MIS SOURI.

SHAFT-TURNING- TOOL.

Application filed. December 4, 1920. Serial No. 428,246.

T0 all 10h-0m t may concern:

Be it known that I, WILLIAM Z. LrNDERs, a citizen of the United States,residing at St. Louis, Missouri, have invented a certain new and usefulImprovement in Shaft- Turning Tools, of which the following is a full,clear, and eXact description, such as will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, forming part of this specification.

My invention has relation to improvements in shaft-turning tools andconsists in the novel features of construction more fully set forth inthe specification and pointed out in the claims.

The present invention is particularly directed to tools for turning downengine crank shafts in order to make the same true after they havebecome worn through continued use.

It is well understood that through the loosening of the bearings, crankshafts will get out of true after a certain period, and it is thepurpose of the present invention to provide a tool for again truing thecrank shafts in a simple and efficient manner.

The object of the present invention is to provide a tool of thecharacter referred to that is simple in construction and one that may bequickly applied.

A further object is to provide a sha-ftturning tool that may be adjustedto operate efficiently on shafts of various diameters within certainlimits.

Further and other advantages will be better apparent from a detaileddescription of the invention in connection with the accompanyingdrawings, in which,-

Figure 1 is a top plan view of my invention, with parts broken away andparts shown in section.

Figure 2 is a side elevation of the same.

Figure 3 is a vertical cross section on the zigzag line 3-3 of Figure 2.

Figure 4 is a detached enlarged view of one of the bearing blocks forthe shaft.

Figure 5 is an end elevation of the block shown in Figure 4.

Figure 6 is a side elevation of the bearing block carrying the cutterblade, parts of said block and blade being broken away.

Figure 7 is an end elevation of the block shown in Figure 6.

Figure 8 is a perspective view of the bearing block that carriesy thecutter blade.

Referring to the drawings more particularly, 1 and 2 represent U-shapedframe members hinged at 3 and provided with a clamping bolt 4 and nut 5opposite the hinge. The frames 1 and 2 are provided with marginalshoulders 6 and 6, respectively, said shoulders providing between themguideways 7 and 7 wherein oppositely disposed bearing blocks 8 and 8 areadapted to slide. The bearing block 8, shown at the left side of Figure.2, is provided with two pairs of oppositely disposed ears 9, 9 betweeneach pair of which are mounted rollers 10 for engaging on the peripheryof any shaft S which itis desired to turn down. The block 8 isadjustable in the guideways 7 by means of an adjusting screw 11extending through the yoke of the frame 1, said adjusting screw beingprovided on its outer end with a knurled head 12 for manipulating thesame. When the block 8 has been suitably adjusted, it is adapted to belocked in position by a stud 18 operating through a slot 14 in the frame1, said stud being threaded into the block 8 and provided on its outerend with a locking washer 15 interposed between the frame 1 and alocking nut 16.

The block 8 which operates in the guideways 7 of the frame 2 is providedwith a transverse slot 17 wherein a cutter blade 18 is adjustablydisposed. The block 8 is adj ustable in the frame 2 by means of a hollowscrew 19, which lscrew traverses the yoke of the frame 2 and hub 20projecting from said yoke, the inner end of the screw 19 being adaptedto bear against the adjacent end of the block V8 and the outer end ofthe screw 19 being provided with a knurled head 21 for manipulating saidscrew. A lock nut 22 is provided for locking the shaft 19 when desired.

The hollow screw 19 is traversed by a second screw 23, the inner end ofthe screw 23 being adapted to traverse an opening 24 in the end of theblock 8', whereby the inner end of said screw 23 may be brought intoabutting relation with the adjacent end of the cutter blade 18. Theouter end of the screw 23 is also provided with a knurled coiled spring25 1s positioned between the knurled head 21 and the lrnurled head 211and exerts pressure against the head 24 whereby said head and screw 23are held against accidental displacement.

After the cutter blade 18 has been adjusted in the block 8, the same maybe locked in its adjusted position by a stud 2G which traverses a slot27 in the frame 2 and likewise traverses a slot 28 in the cutter blade,one end of which stud is screwed into the lower part of the block 8while the opposite end is enveloped by a sleeve 29 over which is passeda lock nut 30 by virtue of which sleeve 29 is caused to bear down on theupper surface of the block 8, thereby binding the cutter blade 18 in theslot 17.

ln order that the blade 18 may engage the shaft S squarely, the cutterblade 18 is provided with an angular adjustment which, in the presentinstance, taires the form of a cylindrical member 31 operat ing throughan opening through one side of the block. 8, said cylindrical memberhaving' a reduce-d tlneaded extremity 33 which is adapted to screw int-oa threaded opening 3l in the sideof the block 8 opposite theopening 32.About midway of its extremities the cylindrical member 31 is providedwith an annular recess 35, said recess being positioned withiny acentral longitudinally disposed slot 36 in the block 8', said slot 36communicating with the slot 1T. The blade 18 is provided near itsforward end with a stud 37 having ahead 38 projecting into the .slot 36,and said head being of the same diameter as the width of the slot 36,thereby bearing against the sides of the slot. The cutter 18 is furtherprovided near its rear end with a pin 391 said pin 39 projectingupwardljlv and into the recess 35 of the member 31. However, the pin 39is of a diameter smaller than the width of the slot 36 so that uponscrewing the member 30 into or out of the block 8, said pin 39 will belaterally moved within the slot 36, thereby oscillating the blade 18 inthe slot 17 about the head 38 as a pivot. Since the slots 17 and 36extend practically through the block 8, l provide a pair of stiffeningpins 40 through the block 8 and traversing the slot 36. rlhe block 8 isprovided on its inner end with oppositely disposed pairs of ears 41between each pair of which are mounted rollers 42, similar to therollers 10. y.

ln turning` down shaft for the purpose 'of truing the same, members 1and 2 are uncoupled opposite the hinge 3` whereupon they may be placedover a shaft S and the bearing block 8 is then adjusted in the frame 1so that the rollers 10 will bear on the periphery of the shaft. Theblock 8 is now locked in its position. by means of the lock nut 1G.vhereupon the block 8 may be brought into adjusted position,

Before adjusting the block 8, it is neces sary to see that the cutterblade 18 is suf-- iciently withdrawn in the slot 17 to permit of therollers 42- engaging` the shaft S. Such being the case, the block 8 isadvanced by means of the adjusting screw 19 and when the rollers 42 haveengaged the shaft, the lock nut is utilized to hold block 8 in suchadjusted position.

rllhe critter' is now adjusted by advancing the screw 23 by means ofknurled head 2l and the cutter having been advanced so as to engage theshaft S, said cutter is locked in position by turning down on thelocking nut 30. The Itool is now rotated on the shaft a suliicientdistance in order to determine whether the blad-e 18 is taking off asquare cut. lf such is the case, the blade 18 is properly adjusted, butif :if taper cut is being removed from the shaft, we known that ourcutter is not square to the shaft and it becomes necessary to square thecutter blade by turning cylindrical member 32 a certain distance inorder to swing the cutter blade to a position square with the shaft.

In order to determine the amount cylindrical member 30 has to be turned,l may provide on the base of said cylindrical member a micrometeradjustment and scale, such as shown in Figure 2.

Having squared the blade 18 and" having clamped the blade firmly in theblock 8, I may now proceed with the cutting operation, and as successivecuts are removed from the shaft, the block 8 is gradually advanced inorder to maintain the rollers )f2 in contact with the shaft, therebyinsuring that the same will be turned down true.

From the above description, it will be apparent that l have provided ashaftturning tool that is not only simple in its operation, but islikewise simple in its adjustments and that said adjustments when oncemade are f1Xed and not liable to slip and cause an error to creep intothe work.

Having described my invention, I claim:

1. A shaft-turning tool provided with' a frame consisting of hingedrseparable members, means pivotally arranged on one of said members forlocking said members together, a pair of bearing blocks slidably mountedin said frame, means for clamping one of said bearing blocks in theframe, a cutter positioned in the other bearing block, means forclamping the cutter therein, and means for feeding` said cutter block.

2. A shaft-turning tool provided with a frame having bearing bloelrsmounted therein, means for adjusting said blocks to the shaft, one ofsaid blocks being provided with a cutter, and means for adjusting thecutter longitudinally and angularly in said block.

3. A shaft-turning tool provided with a pair of oppositely disposedJframe members, said frame members having bearing blocks mountedtherein, means for adjusting one of said vblocks to the shaft andclamping theJ same in adjusted position, means for adjusting the otherblock toward the shaft and temporarily locking the same, a cutter blademounted in said last-mentioned block, means for clamping said cutterblade in the block, and means for feeding said block carrying the cutterblade.

4. A shaft-turning tool comprising a separable support, a pair ofopposed bearing blocks mounted therein, each block having lugsprojecting towards the opposite block, antifriction means mounted insaid lugs, and adapted to engage the Work, cutting tool mounted in oneof said blocks and means for adjusting said tool angularly relative tothe shaft.

5. A shaft-turning tool provided With oppositely disposed frame members,bearing blocks in said frame members, the adjacent ends of said bearingblocks being provided with a pair of rollers in spaced apart relation,means for looking one of said bearing blocks in the frame, a cutterblade mounted in the other of said blocks2 means for locking the cutterblade therein, and means Jfor advancing the cutter block 1n the frame.

G. A shaft-turning tool provided With a pair of oppositely disposedbearing blocks, one of said bearing blocks being transversely slotted toreceive a cutter bzlade and longitudinally slotted to receive a studprojecting from the cutter blade, and means for angularly adjusting thecutter blade about said stud as a pivot.

7. A shaft-turning 'tool provided with a pair of oppositely disposedframe members rovided with guideWays, bearing blocks slidably mounted insaid guideWays, said bearing blocks being provided on adjacent ends withrollers in spaced apart relation, means for locking one of said bearingblocks in the frame, means for temporarily locking the opposite bearingblock in the frame, a cutter blade adjustably mounted in said lastmentioned bearing block, means for locking said cutter blade therein,andV means for advancing said block in the frame.

8. A turning tool comprising a support, a pair of oppositely disposedblocks mounted therein, means for moving said blocks in said support, acutting tool pivotally arranged in one of said blocks, means for movingsaid tool longitudinally in its block, and means for operating said toolabout its pivot whereby the cutting edge of said tool may be adjustedangularly relative t0 the aXis of the Work.

9. A turning tool comprising a support, a pair of oppositely disposedblocks mounted therein, means for moving said blocks in said support, acutting tool pivotally arranged in one of said blocks, means Jfor movingsaid tool longitudinally in its block, means for operating said toolabout its pivot whereby the cutting edge of said tool may be adjustedangularly relative to the aXis of the Work, and means forv locking thecutter in its block.

10. A turning tool comprising a support, a pair of oppositely disposedblocks mounted in said support, a cutting tool pivotally arranged in oneof said blocks, means for adjusting said cutter block in said support, amember adjustably seated inthe cutter block, and means on said cuttingtool in engagement With said adjustable member whereby said cutting toolmay be operated about its pivot and adjusted relative to the Work.

In testimony whereof I hereunto affix my signature this 1st day ofDecember, 1920.

WILLIAM Z. LINDERS.

